Alternative · Exclaimer

Replacing Exclaimer: the alternatives and the migration, step by step

Exclaimer no longer fits? Discover the alternatives available — ATOM and other vendors — and how to migrate without interrupting your signatures.

By the ATOM Solutions team · Updated

Using Exclaimer and looking to replace it? Whether the reason is data residency, USD pricing or the complexity of marketing tiers, this guide compares the options actually available — not just ATOM — and walks through the migration step by step, without changing your email routing.

In short: to replace Exclaimer, your options are ATOM Signatures (Canadian hosting, single flat price), CodeTwo, Letsignit or Signitic (different architectures and pricing), or Microsoft 365's native signature for a minimal need. Switching to ATOM takes a few steps, without changing your email routing. For a detailed side-by-side, see ATOM vs Exclaimer.
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What are the reasons to leave Exclaimer?

For reasons of data residency, legal framework, cost in a foreign currency, bilingualism and unused features:

  • Data residency. Exclaimer offers a Canada region on its Trust Center, but that isn't the default configuration, and the vendor (United Kingdom) still runs on Microsoft Azure, a US company subject to the CLOUD Act.
  • Legal framework. An organization subject to PIPEDA, or depending on the province to laws such as Law 25, PIPA or PHIPA, needs to know where personal information resides and where email is routed.
  • Cost in a foreign currency. Tiered pricing in US dollars, with a ten-user minimum, complicates budgeting in Canadian dollars.
  • Genuine bilingualism. A product and support that are natively FR-CA / EN-CA, rather than partly localized.
  • Unused features. Exclaimer's banners, analytics and CRM integrations are spread across paid tiers; for an organization that just wants a reliable, compliant signature, this layer adds cost with no matching benefit.

Alternatives to Exclaimer

Leaving Exclaimer doesn't automatically mean choosing ATOM: here are the options, honestly, and who each one suits.

  • ATOM Signatures. 100% Canadian hosting by default, strictly client-side architecture — email never leaves Microsoft 365 — and a single flat rate of CAD $1 per user per month, all-inclusive, banner campaigns included (up to 3 A/B variants, click statistics). Suits Canadian organizations for whom data residency and simple pricing outweigh CRM integrations. See ATOM pricing.
  • CodeTwo. A vendor based in Poland, with a hybrid architecture (server-side relay on Azure, or client-side add-in) and advanced marketing features (banners, click tracking, satisfaction surveys), billed in tiers in US dollars with a ten-license minimum. Suits an organization that needs CSAT surveys or coverage for unmanaged devices, and for whom GDPR, rather than a Canadian framework, is the main reference. See ATOM vs CodeTwo.
  • Letsignit. A French platform, hosted 100% in Europe, combining a client-side add-in with an optional server-side SMTP connector, plus digital business card (vCard) and governed PowerPoint presentation offerings. Suits an organization whose priority is a full marketing-campaign platform, with no constraint around Canadian residency. See ATOM vs Letsignit.
  • Signitic. A French platform with a free plan for up to 19 users, then a paid tier starting at €1 per user per month with a 20-license minimum, hosted 100% in Europe, and which also covers Gmail, Google Workspace and Zoho Mail alongside Microsoft 365. Suits a small European team that prioritizes the lowest price or needs to cover several email platforms. See ATOM vs Signitic.
  • WiseStamp. A New York-based platform deployable client-side (Outlook add-in, Chrome extension), server-side or hybrid, with an AI designer, banner campaigns and tiers (Basic, Grow, Platform, Enterprise) billed from $19 per month plus $1 per employee per month. Suits a multi-brand organization, or one also on Google Workspace, that values SOC 2 Type II and ISO 27001 certifications and for which Canadian hosting is not a requirement. See ATOM vs WiseStamp.
  • Rocketseed. A vendor whose offer relies solely on server-side deployment (Microsoft 365, Google Workspace, Exchange), with no add-in to install, a public price grid starting at 50 employees, a one-time setup fee and 24/7 support with a dedicated account manager. Suits an organization of 50 employees or more that wants a turnkey setup and accepts that its outgoing email goes through the vendor's service. See ATOM vs Rocketseed.
  • Opensense. A San Francisco platform deployable server-side, through an Outlook add-in or via the Gmail API, with banners, email tracking and integrations (directory, HR, CRM), priced from $1 to $5 per user per month with a $500 monthly minimum; data hosted in the United States by default, optional residency in Europe, Asia or Australia, SOC 2 Type II attestation. Suits a large organization that can absorb the monthly minimum, wants to link signature, email tracking and CRM, and for which US hosting is acceptable. See ATOM vs Opensense.
  • Terminus. Email signature marketing (Sigstr) built into an account-based marketing (ABM) platform, with banners that are dynamic by sender, recipient and lifecycle stage; Terminus merged into DemandScience in November 2024 and its signature product pages now redirect to DemandScience's site, with no public price. Suits a B2B marketing team that mainly wants an advertising channel in its employees' emails; confirm with the vendor that the offer is still sold on its own. See ATOM vs Terminus.
  • Microsoft 365's native signature and Exchange transport rules. Free and already included in your subscription, via the local Outlook signature or an Exchange transport rule, but with unreliable images, no fine-grained group targeting, manual maintenance and no signature in Sent Items with transport rules. Suits a very small team with a single, static signature, no logo and no targeting. See ATOM vs Microsoft 365's native signature.

Switching from Exclaimer to ATOM, step by step

  1. Take stock of your signature templates and their targeting rules in Exclaimer (tiers, groups, covered devices).
  2. Connect your Microsoft 365 tenant to ATOM Signatures: administrator consent, read-only access to the directory.
  3. Recreate your signatures in the ATOM editor with "Import HTML", then replace Exclaimer's dynamic fields with ATOM tokens (name, title, phone, etc.).
  4. Reproduce your targeting by Microsoft 365 groups, users and shared mailboxes.
  5. Deploy the ATOM add-in from the Microsoft 365 admin center, using the manifest URL generated in the Connections tab; allow up to 24 hours for propagation.
  6. Remove Exclaimer at cutover: uninstall its add-in and, if you were using its server-side mode, delete the connector and transport rule it created in Exchange Online, per Exclaimer's documentation, to avoid duplicate signatures.
  7. Check the rendering on a few accounts (web, desktop, mobile) before cancelling Exclaimer.

What you lose by leaving Exclaimer

In all honesty, Exclaimer offers real features that ATOM does not:

  • Server-side application available, which adds the signature on any device without depending on an installed add-in.
  • CRM integrations (HubSpot, Salesforce) and multi-brand management.

For an organization that genuinely uses these features, leaving Exclaimer means replacing them with another tool, or doing without.

Comparing Exclaimer and ATOM in detail

For a criterion-by-criterion analysis — table, pricing, architecture, languages — see the full ATOM vs Exclaimer comparison.

Related reading: what the Exclaimer renewal increase costs over 3 years.

Frequently asked questions

Can I bring my Exclaimer templates over to ATOM?

Yes. The ATOM visual editor offers "Import HTML": paste your Exclaimer template's code, then replace its dynamic fields with ATOM tokens (name, title, phone, etc.) so the data updates automatically via Microsoft Graph.

Do I need to remove Exclaimer before installing ATOM?

No, you can deploy the ATOM add-in while Exclaimer is still active to test the rendering. At cutover, however, remove Exclaimer (the add-in, and its connector or transport rule if you were using its server-side mode) to avoid two signatures being added to the same message.

How long does switching from Exclaimer to ATOM take?

It depends on how many templates you have and how complex your targeting is. The only guaranteed timeframe is the add-in deployment itself: Microsoft states up to 24 hours of propagation for a new centralized deployment.

What other alternatives to Exclaimer exist?

Depending on your priorities: CodeTwo (advanced marketing features, GDPR), Letsignit (digital business cards and presentations, European hosting), Signitic (lowest price for a small European team), or Microsoft 365's native signature for a minimal, static need.

Replace Exclaimer with no email routing. ATOM Signatures automatically applies the right signature in Outlook, client-side, with 100% Canadian hosting and a rate of CAD $1 per user.

Discover ATOM Signatures

Also read: the ATOM vs Exclaimer comparison and the overview of email signature software alternatives. The product in detail: Office 365 email signature management with ATOM.

Sources

This guide is provided for information purposes; Exclaimer's prices and hosting regions may change — verify the official sources. ATOM Solutions is not affiliated with Exclaimer. This article does not constitute legal advice.